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_ 10 May 2000 <br /> AGE-NC Project No. 99-0541 <br /> _ Page 4 of 5 <br /> RESULTS OF LABORATORY ANALYSIS <br /> A total of two soil samples and two ground water samples were submitted to the laboratory for <br /> analysis for TPH-g, TPH-d, BTEX, fuel oxygenated compounds, and volatile organic compounds. <br /> TPH-d was detected in the grab ground water sample collected from B2 at a concentration of 89 <br /> micrograms per liter (/../g/1). No other target analytes were detected in any of the other samples <br /> submitted for analysis. The laboratory reports and chain-of-custody forms are included in <br /> Appendix A. A summary of analytical data from this investigation is presented in Tables 1 and 2. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Based upon the results of laboratory analysis, AGE concludes: <br /> • Soil in the areas of the borings east of the former USTs has not been impacted by petroleum <br /> hydrocarbons. <br /> • Ground water in the area of one soil boring east of the former UST system has been impacted <br /> by petroleum hydrocarbons quantified as diesel. The distance of the sampling point from the <br /> former UST facility indicates a potentially significant impact to ground water in the more <br /> proximal vicinity of the former UST facility. <br /> The extent of the petroleum hydrocarbon impact to soil and ground water in the immediate <br /> vicinity of the former USTs can not be determined without additional data. <br /> Based upon the results of laboratory analysis, AGE recommends: <br /> • Additional subsurface investigation to assess the lateral and vertical extent of the petroleum <br /> hydrocarbon impact to soil and ground water in the immediate vicinity of the fornler USTs. <br /> Advanced GeoEn ironmental,Inc. <br />